Leo Duyndam (Poeldijk, 2 January 1948 — Nice, France, 26 July 1990) was a Dutch professional road bicycle racer.
Major results
- 1967
- Omloop der Kempen
- 1968
- Netherlands National Track Pursuit Championship
- Ronde van Limburg
- Six Days of Ghent (with Peter Post)
- 1969
- Bladel
- Elfstedenronde
- Goirle
- Honselersdijk
- Ede
- 1970
- Netherlands National Track Pursuit Championship
- Schinnen
- Lutlommel
- Berner Rundfahrt
- Rotterdam Coolsingel
- 1971
- Six Days of Antwerpen (with René Pijnen and Peter Post)
- Arendonk
- Polderpijl
- Ulvenhout
- Roden
- Papendrecht
- Arnhem
- 1972
- Grave
- Maaslandse Pijl
- Neeroeteren
- Polder-Kempen
- Six Days of Rotterdam (with René Pijnen)
- Six Days of Antwerpen (with René Pijnen and Theo Verschueren)
- Six Days of Berlin (with René Pijnen)
- Six Days of Frankfurt (with Jürgen Tschan)
- Tour de France:
- Winner stage 6
- 1973
- Berlare
- European Track Madison Championship (with René Pijnen)
- Six Days of Rotterdam (with René Pijnen)
- Six Days of Antwerpen (with Gerard Koel and René Pijnen)
- Zomergem
- Six Days of London (with Gerben Karstens)
- Six Days of München (with René Pijnen)
- Six Days of Zürich (with Piet de Wit)
- 1974
- Netherlands National Track Omnium Championship
- Profronde van Pijnacker
- Rummen
- Six Days of Bremen (with René Pijnen)
- Six Days of Rotterdam (with René Pijnen)
- Knokke
- Koksijde
- Six Days of Herning (with Ole Ritter)
- 1975
- Six Days of Rotterdam (with Gerben Karstens)
- Six Days of Herning (with Ole Ritter)